Pulley or wheel.



PATENTED JULY 21, 1908..

L. ZAMBONI.

PULLEY 0R WHEEL. APIJIoATIoN FILED MAR. 5. 1905.

alito/m 1 e 1 LAWRENCE ZAMBONI, OF PHILADELPHIA, PENNSYLVANIA..

PULLEY OR WHEEL.

Specification of Letters Patent.

Application filed March 6, 1905.

Patented July 21, 1908.

Serial No. 248,523.

To all whom it may concern:

'Be it known that-l, LAWRENCE ZAMnoNI, a citizenof the United States,residing in Philadelphia, county of Philadelpl'iia, and State ofPennsylvania, have made a new and useful Invention in Pulleys or Wheels,of

whiclithe following isa specification.

may be quickly and cheaply made. 1 to construct such a pulley of twointerlocking .My invention is directed particularly to Limprovements inpulleys or wheels of the pressed metal type g that is to say, such asare made by vthe compression of cold steel in,

dies; for instance, as is disclosed in. a prior patent granted to .me onthe 9th day of February, 1904, and. numbered 751,707, and it has for itsobjects-First, to devise a pulley or wheel of this typelwhich shallpossess great strength, be simpleof construction, and Second,

halves, each of which is formed by overlapping the metal of itsvrespective half upon itself, the outer overlapping portion of one ofsaid interlockingparts being adapted to directly sustain the belt orrope to `be used with the pulley, the arrangement of the parts beingsuch that when interlocked, the action of the belt or rope tends to holdsaid interlocking parts more firmly together. Third, to provide such apulley with a duplex hub sustaining web which is formed simultaneouslywith the formation of the interlocking parts and with they rope bearingflanges. i

In the pulley or wheel disclosed in my before-mentioned patent the twohalves thereof are held together by a locking device located in thegrooves in the web of the pulley and at a considerable distance fromlth'eouter belt or rope bearing rim thereof, and the locking device, inthe nature of a metal strip,

with the holding parts are then bent upward with their free ends againstthe under surface of the belt bearing rim. i

The before-mentioned pulley or wheel vis Without any form of hub `andtheweb thereof, to which thehub is to be-'aittached, is of suchconstruction that if a hub be supplied it mustnecessarily be so constructed `as to materially complicate the entire structure. rA pulley orwheel as thus constructed is also open to the objection that because ol'the fact that the locking device or ring is secured firmly in. the weband at some distance from the ,f

grooved or belt bearing rim, there a tendency for the. `flangesconstituting the groove to separate when great stress is put upon thepulley by the driving rope.

The present improvement overcomes all of these objections, in thatl.locate the interlocking parts absolutely in the outer belt or ropebearing rim of the pulley and secure the interlocking device at thatpoint in such manner as to obtain the best practical results, afterwardsbrazing the parts together so as to produce a pulley which ispracticallyas strong as a cast steel pulley, the overlappinginterlocking parts in double folds constituting a belt or rope bearingrim immediately beneath the rope bearing surface which gives to thepulley great strength.

v For a full and clear understanding of my .i

invention, such as will enable others Skilled in the art to constructand'use the same, reference is had to the accompanying drawings whiohshow all of the-details of a full sized pulley, and in which,

Figurel 1 is a side elevational view thereof;

Fig. 2 being a sectional view taken through Fig. l on the line X-Xillustrating the 4interloekingxflanges of the hub in'elevational view.F1g. 3 is a side elevational view of the split locking ring., Fig. 4 isan edge view;'V

and, Fig. 5 1s a plan view of the developed form ofthe blank from whichthe hub is made. Fig. 6 is an end elevational view of the completed hub;and. Fig. 7 is a sectional view thereof taken on the line Y-Y Fig. 6..

Referring now to' the drawings in detail in all of which like vnumeralsindicate like parts wherever used, 1, 2 indicate the two ialves of thepulley or Wheel made from circular disks, preferably of relatively thinsheet steel, and ressed in forming dies in-a manner well un erstood bythose skilled in the art and in such way as to form the flanges or faces9, 9, of the groove for the belt or rope and a duplex curvilinear webpart 8, 8, as shown, there being formed during the act Aof suchcompression of each half two interlocking parts indicated respectivelyby the numerals 10 and 11, these interlocking parts being formed by thefolding of the metal uponitself in each instance, the outer overlappingfold 12 of the part 10 constituting a portion of the rope bearingsurface of the pulley and the arrangement such, as will be seen onexamination of Fig. 2, that the stress fput upon the rope will tend tohold the intero'cking p. 'ts more 'firmly together. At the same time:that these interlocking parts and rope bearingflanges or faces areformed two curvilinearl` supporting parts 6, 6l provided with interilalradially disposed grooves,four

inclined end-faces, k3

steel wire.

in number, for sustaining the hub, are also formed, as shown in Figs. land 2.

. 4 is a split locking ring made preferably of vmanner illustrated inFig. 6 there is a plurality of radially disposedarms 5, 5, 5,havrepresenting the body of the hub pro er. ,These arms 5, 5, arepreferably forme as. shown in Fig. 7 and are adapted to fit, by reasonof their inclined ends when the two halves of the pulleyare put4together, into the curvilinear supporting arts 6, 6, in each of saidhalves and, as before stated, at the inner portion of the double or,duplex web 8, 8.

These parts are constructed and assembled as followsv-The two halves land 2 of the pulley are formed in dies giving to them the substantialconformation shown and then the locking ring 4 is 'sprung intopositionbetween the folds of the outer locking part 10. he hub, `formed asbefore described, is then inserted in position with the ends of thearms- 5, 5, in the' curvilinear supporting grooves 6, 6, and all of theparts sprun in'to locked position, as shown in Fig.' 2. terwards the twohalves may bej brazed together in thelocking groove and at the ends ofthe hub and its support,l thereby constituting a substantially integralpulley or wheel. If desired, an accurately turned bushing 7 (see Fig. 1)may be inserted within,

the hub 3 and secured thereto by brazing, soldering, keying, or in anyreferred way. All of lthat portion of the pu ley outside of the dottedlines Z-,-Z Z-Z Fig. 2 I denominate as. the'rope bearing rim proper ofthe ulley, and all of that portion between said ines Z-Z yZ-Z and thecurvilinear supporting parts 6, r6, and indicated by the numerals 8, 8,I denominate as the web of the pulley.

I believe it is broadly new with me to provide a pulley of the pressedmetal t e with two interlocking parts composed o metal folded in eachinstance upon itself and soarranged that when the parts are lockedtogether the outer fold of one of said interlocking parts is directlyexposed to and adapted to be placed in frictional contactlwith thedriving rope or belt and in such way that the stress thereof tends tomore firmly lockthe parts together and to avoid any possibility of asplitting action when great stress is put upon the driving or drivenrope, and my claims are glpneric as to this feature.

I-Iaving t us described my invention what I claim and desire to secureby Letters Patent of the United States isl. A pulley constructed of twohalves of metal provided each with an interlockingpart `folded uponitself, the outer fold of one of said interlocking parts being adaptedto rest directly under 'and in contact with the driving rope or belt,theI arrangement being such that the stress of said rope or belt tendstomore firmly lock'the parts together, substantially as described.

Q 2. A two-part pulley having interlocking parts which overlap eachother,l and a split locking rin located between the folds of the -outerinter` ocking part, the outer surface of which part is adapted todirectly support the driving rope or belt, substantially as' described.

3. Apulley constructed of two interlock-L ing halves the web portion ofeach halfbeing curvedoutward toward the center and provided with hubsupporting grooves; in coinbination with a hub having radially disposedarms iitting in such grooves, substantially as described.

4. A pulley hub constructed of a single piece of metal bent incylindrical form and provided with radially disposed sustaining armshaving inclined end faces, substantially 'as described..

5. A pulley hub constructed of a single piece of metal having radiallydisposed arms ent back and forth, the body of the hub be- `ing longerthan the outer ends of the arms,

and said arms being provided with. inclined end surfaces, substantiallyas described.

6. A pulley constructed of two sheet instal.

disks having a conjoint belt surface and a curvilinear duplex webprovided with indented or depressed grooves; in combination with a hubmade of a single'piece of metal. Y

'having radially disposed arms adapted to be secured in said grooves,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

A LAWRENCE ZALMBONLv l/Vitnesses: K

' C.' J. KINTNER,

M. F, KEATING',

